Cannot submit value of a spinbox [SOLVED]

[SGaist]

Hi,

Are you calling setValue before you setup the mapper ?

[Mr. Kibu]

Yes, submit is called in a submit-function.

[SGaist]

It's not what I'm asking; when are you calling ui->spinBox->setValue(4) ? Before or after setting up the mapper ?

[Mr. Kibu]

Ok, I set the mapper in the constructor, set the spinbox in a event-function and submit the data in a submit-function. So I think that I set the mapper befor.

[SGaist]

What event function ?

[Mr. Kibu]

void frmBeleg::on_txtAnm1_editingFinished()
{
    ui->txtBelegNr->setValue(4);//<<<< this is the spinbox that not work
    ui->txtAnm2->setText("tessst");//<<<this is a combobox; after submit is the value in the database
}```

[SGaist]

Can you show how you setup the mapper ?

[Mr. Kibu]

Here is the constructor of the dialog (frmBeleg):

frmBeleg::frmBeleg(int BelegID, QSqlRelationalTableModel *BelegMod, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::frmBeleg)
{
    ui->setupUi(this);

    mapper=new QDataWidgetMapper(this);
    mapper->setModel(BelegMod);
    //mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
    mapper->setItemDelegate(new QSqlRelationalDelegate(mapper));

    mapper->addMapping(ui->txtBelegNr,2);//<<<<<    the spinbox
    mapper->addMapping(ui->txtAnm1,14);//<<<<<<<   the combo

    if (BelegID != -1) {
            for (int row = 0; row < BelegMod->rowCount(); ++row) {
                QSqlRecord record = BelegMod->record(row);
                if (record.value(0).toInt() == BelegID) {//Spalte des Key-Feldes
                    mapper->setCurrentIndex(row);
                    break;
                }
            }
        }
        else {
            mapper->toFirst();
            }

[Mr. Kibu]

Addition:

It is no problem to use the passed model from the mainwindow in the constuctor of the dialog (frmBeleg).
When I use the model (BelegMod) in a function, than I have no error at buildung the application but the programm crashes when I use the function in the programm.

For example I tried:

void frmBeleg::on_btnSave_clicked()
{
    mapper->submit();

    if (BelegMod->submitAll())
        BelegMod->database().commit();
    else
        BelegMod->database().rollback();

    frmBeleg::close();
}

Or:

void frmBeleg::on_btnNextBelegNr_clicked()
{
    QSqlQueryModel modMaxBelNr;
    modMaxBelNr.setQuery("SELECT max(BelegNr) FROM Belege");
    int nextBelegNr = modMaxBelNr.data(modMaxBelNr.index(0, 0)).toInt();
    BelegMod->setData(BelegMod->index(0,2), nextBelegNr+1);
}

How can I use the passed model in a function?

Thank's

Franz

[SGaist]

Are you initializing BelegMod properly in the constructor ?

[Mr. Kibu]

I hope that I have understand your question:

I am initializing the model "modBelege" in the function "on_actionBelege_triggered" like this:

void MainWindow::on_actionBelege_triggered()
{
    ui->stackedWidget->setCurrentIndex(0);

    modBelege = new QSqlRelationalTableModel(this, cn::db());
    modBelege->setEditStrategy(QSqlRelationalTableModel::OnFieldChange);
    modBelege->setTable("belege");

    //modBelege->setRelation(19, QSqlRelation("Zahlarten","ZahlartKey","Zahlart"));
    modBelege->setRelation(8, QSqlRelation("kontakte","AdrKey","Name"));
    modBelege->select();
    ......

Then I pass the model (modBeleg) to the dialog:

void MainWindow::editBeleg()
{
    //####search the row of the tableview "tabBelege"
    QModelIndexList indexList = ui->tabBelege->selectionModel()->selectedIndexes();
    int row;
    foreach (QModelIndex index, indexList) {
        row = index.row();
    }

    //####get Key-value in column 0

    int _selBelegKey = ui->tabBelege->model()->data(ui->tabBelege->model()->index(row,0)).toInt();

    //#### open dialog:
    frmBeleg newBeleg(_selBelegKey,modBelege, this);
    newBeleg.exec();
}

Hope it helps!

[SGaist]

In the frmBeleg constructor, do you assign modBelege to BelegMod ?

[Mr. Kibu]

I have only this code in frmBeleg:

frmBeleg::frmBeleg(int BelegID, QSqlRelationalTableModel *BelegMod, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::frmBeleg)
{
    ui->setupUi(this);
    ...

[SGaist]

From your code it seems that you don't initialize your class member that is also named BeleMod

[Mr. Kibu]

And how can I do this? And is it better to rename BelegMod?

[SGaist]

frmBeleg::frmBeleg(int BelegID, QSqlRelationalTableModel *BelegMod, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::frmBeleg),
    BelegMod(BelegMod)
{

But yes,

frmBeleg::frmBeleg(int BelegID, QSqlRelationalTableModel *model, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::frmBeleg),
    BelegMod(model)
{

is clearer.

One thing I recommend: use a clear naming scheme e.g. camel case with starting letter lowercased for variables and camel case for classes. It will make your code easier to read (following Qt's pattern is good idea)

[Mr. Kibu]

Hi SGaist!

It works. Thank you for your help!

märssi

Franz